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研究了碳酸钙对PA6/PP合金体系材料性能和相形态的影响,并考察了其作用机制。结果表明:碳酸钙的添加可提高材料热变形温度,但会降低其力学性能;在碳酸钙添加的条件下,PP分散相表现出从样品表面至内部,逐渐从薄到厚、从片状到不规则柱状的形态演变规律;以上规律被认为与其添加导致PP/MAPP熔体黏度和强度增大,使之难以在PA6熔融后的相逆转过程中发生凝集破坏而形成近球状的分散相结构有关;一步法和母料法中碳酸钙的作用机制相同,其相形态结构也具有较好的相似性。
The effects of calcium carbonate on the properties and phase morphology of PA6 / PP alloy were investigated. The mechanism of action was also investigated. The results show that the addition of calcium carbonate can increase the thermal deformation temperature of the material, but reduce its mechanical properties. Under the condition of calcium carbonate addition, PP disperse phase appears from the surface to the interior of the sample gradually from thin to thick, Irregular columnar morphology evolution rule; the above rule is believed to be associated with the addition of PP / MAPP melt viscosity and strength increases, making it difficult to phase collapse in the PA6 after melting during the formation of nearly spherical dispersed phase structure One-step method and the masterbatch method in the same mechanism of action of calcium carbonate, its phase morphology structure also has good similarity.